Lock for anchor-sockets for screws



I. D. STINE.

LOCK FOR ANCHOR SOCKETS FOR SCREWS.

APPLICATION FILED SEPT. 30, I9I9.

Patented Mar. 16, 1920.

UNITED STATES PATENT OFFICE.

ISAAC D. STINE, F WATERBURY, CONNECTICUT, ASSIGNOR OF ONE-HALF T0 FRANKHAYES, OF WATERBURY, CONNECTICUT.

LOCK FOR- ANCHOR-SOCKETS FOR SCREWS.

Application led September 30, 1919.

To all lwko/2L t may concern:

Be it known that I, ISAAC D. STINE, a. citizen of the United States,residing at Natel-bury, in the county of New Haven and State ofConnecticut, have invented new and useful Improvements in Locks forAnchor-Sockets for Screws, of which the following is a specification.

This invention relates to means for securing screws in wood, brick,concrete, or other materia-l, and more especially to anchoring meansadapted to be driven into lixed posit-ion in the material. It has forits object to provide improved locking` devices for the anchoring means.The invention consists in a simple and secure positive locking deviceactuated by the material at the bottom of the hole formed to receive theanchor socket. As the anchor socket is driven home to ixed position thelocking devices are driven out on the sides of the lsocket into theadjoining material to form a powerful lock ao'ainst the removal of thesocket.

In the accompanying drawing,

Figure l is al View showing the anchor socket driven part way into thehole in the material with the locking pins in unlocked position and withone half of t-he socket removed, and

Fig. 2 is a view showing th'.` anchor socket driven home to fixedposition with the locking devices in locked position.

Referring to the drawing, the anchor socket l is provided with anegatively threaded screw hole 2 adapted to receive a screw. rlieroughened outside of the anchor socket is provided with two spaced-apartincnts 8 which serve to increase the gripping eliect of the surroundingmaterial A in which the socket is embedded. From opposite sides of thelower incut 3 two holes evtend inwardly and downwardly to the lower endof the anchor socket.

Specication of Letters Patent.

Patented Mar. 16, 1920.

Serial No. 327,436.

The locking device comprises an integral piece Vof wire bent at thecenter to form loop 5 with two equal extensions 4. This is similar instructure to the ordinary cotter pin. To insert it in the anchor socketl the extensions are spread apart by means of a knife edge and theirends inserted in the holes at the bottom of the socket. The lockingdevice is then pushed up until the ends of the extensions et appear atthe sides of the anchor socket as shown in Fig. l.

As the anchor socket is driven into the hole in the material the loop 5first touches the material at the bottom of the hole. As the anchorsocket is driven in farther the extensions i are forced upwardly andoutwardly into the surrounding` material, and when the socket is drivenhome to fixed position these extensions form a powerful lock in thesurrounding material.

It is evident that modifications may be made within the scope of myinvention and l do not limit myself except as in the ap pended claims.

I claim:

l. In combination, an anchor socket for screws, a hole extendingfrom oneside of to the bottom of said socket, a. pin of greater length than saidhole adapted to slide therein, and a head on said pin. p 2. Incombination, an anchor socket for screws, holes extending` from theopposite sides to the lower end of said anchor socket, and a wire theends of which in unlocked position lie in said holes and the center ofwhich is bent to form a loop lying` in unlocked position below the endof said anchor socket.

Subscribed at lvaterbury, in the county of New Haven and the State ofConnecticut this 19th day of September 1919.

ISAAC D. sTiNn. [L e]

